Portable battery backpack



FIG. 1 is a front side elevational view of a portable battery backpack showing our new design;

FIG. 2 is a rear side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof.

Any elements shown in dotted and/or dashed lines are provided for illustrative purposes only and form no part of the design claimed. Any surface shading is used solely to show the character or contour of the surfaces represented. 

CLAIM What is claimed is the ornamental design for a portable battery backpack, as shown and described. 